<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>

</body>
<script>
	let obj = {};
	let obj2 = obj;
	console.log(obj === obj2);// true
	obj2.a = 1;
	console.log(obj.a);
	obj2 = {};
	console.log(obj)
</script>
</html>